#include "wdtx_usart.h"

uint8_t receivedBuffer[14];
uint8_t state = 0;
uint8_t pointer = 0;

void USART1_IRQHandler(void)
{
	if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
	{
		if(state == 0)
		{
			receivedBuffer[pointer++] = USART_ReceiveData(USART1) - '0';
			if(pointer >= 14)
			{
				pointer = 0;
				state = 1;
			}
		}
		USART_ClearITPendingBit(USART1,USART_IT_RXNE);
	}
}

uint8_t* Usart_GetReceivedData(void)
{
	return receivedBuffer;
}

void Usart_ClearReceivedBuffer(void)
{
	state = 0;
}

uint8_t Usart_HasReceivedData(void)
{
	return state;
}

void Usart_defaultInit(void)
{
	USART_InitTypeDef USART_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA,ENABLE);
	USART_DeInit(USART1);
	
	USART_InitStructure.USART_BaudRate = 9600;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	
	USART_Init(USART1,&USART_InitStructure);
	
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA,&GPIO_InitStructure);
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOA,&GPIO_InitStructure);
	
	NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
	
	USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
	
	USART_Cmd(USART1,ENABLE);
}

void Usart_SendCalendar(Calendar cal)
{
	Usart_SendStr("The current time is : ");
	Usart_SendInt32(cal->year);
	Usart_SendStr("-");
	Usart_SendInt32(cal->month);
	Usart_SendStr("-");
	Usart_SendInt32(cal->day);
	Usart_SendStr("  ");
	Usart_SendInt32(cal->hour);
	Usart_SendStr(":");
	Usart_SendInt32(cal->minute);
	Usart_SendStr(":");
	Usart_SendInt32(cal->second);
	Usart_SendStr("\r\n");
}

void Usart_SendInt32(uint32_t data)
{
	unsigned char datac[20];
	unsigned char i = 0;
	
	while(data != 0)
	{
		datac[i++] = data % 10 + '0';
		data /= 10;
	}
	
	if(i > 1)
	{
		while(i)
		{
			USART_SendData(USART1,datac[--i]);
			while((USART1->SR & 0x40) == 0);
		}
	}
	else
	{
		USART_SendData(USART1,'0');
		while((USART1->SR & 0x40) == 0);
		if(i == 1)
		{
			USART_SendData(USART1,datac[--i]);
		}
		else
		{
			USART_SendData(USART1,'0');
		}
		while((USART1->SR & 0x40) == 0);
	}
}

void Usart_SendStr(char *s)
{
	while(*s)
	{
		USART_SendData(USART1,*s);
		while((USART1->SR & 0x40) == 0);
		s++;
	}
}
